Furnace.



PATENTED APR. 9

J. CROMIE.

FURNACE.

APPLICATION FILED NOV. 20. 1906.

2 SHEETSSHBET l.

q/Vihwooeo M25 PATENTED APR. 9

J GROMIE FURNACE.

APPLIOATION FILED NOV. 20. 1906.

2 SHEETS-SHEET 2.

Suvawfoz Wi in zoom r r .rrron FURNACE.

To (hijack/ cm it may concern: I

Be it' known that I, JAMEs 0110mm, a citiren ofthe United States of America,,residing get Pittsburg, in'the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Furnaces, of which the following issuch a full, clear, and exact description as Will enable others skilled inthe art to which it appertains to make anduse the same.

; Thisinvention relates more particularly to heating-furnaces which burn gaseous fuel; audit consists in certain novel features hereinafter firstfully described and then particularly pointediout in the claims.

In the drawings, Figure 1 is a perspective view'of a furnace embodying my invention, parts being broken away to show the internal construction; Fig. '2 is a detail sectional view of aportion of the burner-chamber, the defiectorpand the divergent lines. Fig. 3 is a detail vertical section of a portion of the drum, and'Fig. 4 "is a plan view of the drum.

.The outer shell or casing of the furnace 2 5 may be of the usual construction and may be connected at its bottom with a cold-air flue or. otherwise arranged topermitthe entrance of cold air.

-At or nearits top the shell or casing 1 is gd'p'r'bvided with fines 2. to carry the heated air to the different parts of the building. At the bottom of the shell is provided a door 3 at the outer end of a box 4, which extends from the shell inward to a conical chamber 5, in which 3 5 theburner 6- is located. A feed-pipe 7 extends from the burner outward through the box 4 to any suitable source of supply and is provided with a suitable valve by means of which the flow of fuel to. the burner may be regulated. Above the feed-pipe a horizontal artition 8 extends through the box, and beow the said partition at the inner end of the g box isan opening 9 to admit air to the burner,-

chamber in a steady flow without draft.

4.5 Above the'partition at the inner end of the box is a swingin door 1O, fitted with isinlass, through which the condition of the ame may. be observed. If more air is needed inthe burner-chamber, this door may be g o raised to admit the proper quantity. The

burner-chamber-5 is a frusto-conical shell of sheet metal or similar material, and it may, if desired, be lined with asbestos or brick to prevent diffusion of the heat and cause it all to ascend. through the heating fines and drum. The burner issupported centrally Specification of Iietters Patent. Application filed November 20, 1906. Serial No. $4,239.

Patented April 9,1907.

at the bottom of the chamber by brackets'l 1, pro ectmg inward from the shell, while at the upper end of the chamber and just below the upper edge of the shell I arran'gea ring or annu ar plate 12, which projects slightly above the chamber and is arranged at an angle to the shell, so as to turn the'heat toward the center, 'This ring or annular-plate 12 is supported by brackets or stri s 13, which extend through the central opening of the same andhave t eir upper ends secured to and supportmg a conical deflector 14, the lower ends of the brackets being secured to the shell 5. On

the upper annular edge of the shell5 I fit a ring or support 15, which is 8 shape in crosssection and presents two grooves, one of which engages over the edge of the shell and the other is enga ed bythe lower edge of the triple heatinglie-16.- This heating-flue consists of an annular chamber having a depending slightly-outturned flange 17, which enters the outer groov'e of the ring 15, and three horns or branches '18, rising and di verging from the chamber. These horns or branches are tapered toward their upper ends, which enter and support theheating-drum 19. The top andbottom plates of this drum are provided with annular'fianges, as shown at 20, which engage the outer grooves of S- sha'ped rings 21, the inner rooves of which are engaged over the ends 0% thecylinder 22,

forming the wall of the drum. The outer edges of the .'S-shaped rings are clenched over the top and bottom plates, as shown at 23, thus forming strong tight joints without the use of cement or solder. i

The heating-drum is divided centrally by a horizontal partition 24, and in the chambers thus provided above and below the said partition are spiral vertical partitions 25, which extend from the outer wall of the drum to the inner central cylinder26, forming the inner wall ofthe heatingdrum, a single opening 27 being formed in the partition 24 between the inner cylinder 26 and the inner ends of the partitions to form a communication between the two chambers. A gas-escape flue leads from the outer wall of the drum near the upper end of the same to carry oil the products of combustion or obnoxious odors, and the upper and lower ends of the inner cylinder 26 are connected with the top and bottom plates of the drum through clenched S-shaped rings in the same manner as the outer cylinder is secured thereto. The interior of the cylinder 26 constitutes an air-flue IIO through which air may rise to pass to the flues 2, as will be readily understood.

The use of the furnace will be readily understood. The oil or gas being ignited at the burner, the heat will rise therefrom and pass to the triple flues and thence into the drum, where it will circulate horizontally through the upper and lower chambers of the same and finally pass out through the escape-flue. The heat Will be turned equally into the several branches of the triple flue by the conical deflector and in its 11 ward flight will raise the temperature of t e said fines and the inner and outer walls of the drum, so that the air Within the outer casing in contact with the fines and the drum will be heated before passing out into the building through the warm-air flues. All the joints or seams of my furnace are riveted, and no cement or solder is used. The use of the S-shaped clenching-rings in the joints provides a strong joint through which there will be no leakage and will require no attention or repairs, The heating-currents from the burner are so circulated as to constantly act upon the surfaces in contact with the air to be passed into the building, and there is no available heat al' lowed to pass off into the chimney, the result being that the desired temperature is quickly attained.- As the heat is fed into the drum at three points and can escape at but one point and is forced to circulate s irally around the drum in reverse directions efore leaving the same, the entire bodyof heat is utilized.

The spiral partitions have a slighttendency to expand under the influence of the heat, and to prevent them slipping out of proper position I provide spacers 29, which consist of strips of metal having their ends fitted in the clenching-rings and their intermediate portions formed into notches or grooves which engage'the edges of the partitions, and thereby preserve the proper spacing of the partitions.

n Having thus described my invention, what 1 claim, and desire to secure by Letters Patent, is

1. A furnace comprising a combustion v chamber, a, deflector supported in the u per end of said chamber, a heating-drum, a ove said deflector and combustion-chamber, and a flue resting on the upper end of the combustion chamber comprising a chamber around the deflector and having a series of divergent branches supporting the drum.

A furnace comprising a combustionchamber, a heating-drum having upper and termediate portions supporting the annular plate.

4. The combination of the combustionchamber, an inwardlyprojecting annular plate on the inner face of the said (diamber in the upper end of the same but below the upper edge of its wall, a conical deflector above but out of Contact with said plate, brackets secured upon the inner wall of the combustion-chamber and supporting .the annular plate and the conical deflector, and a flue supported by the upper edge of the wall of the combustion-chamber.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses; i

JAMES oRoMiE.

Witnesses GEORGE A. COOPER, WILLIAM A. MILLER. 

